Fuel Cell Adapter Sealing Structure for Cold-Condition Leak Prevention
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Solution Overview
Problem
Existing combustion powered fastener driving tools experience fuel leaks due to performance degradation of sealing components under extreme environmental conditions, such as cold temperatures, leading to inconsistent fuel delivery.
Innovation Solution
A fuel cell adapter with a polymer or plastic material construction featuring a spiral support structure and specific conical portions that form a fluid-tight seal with the fuel cell receiving block, maintaining sealing integrity despite movements and temperature changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional sealing components are used in fuel delivery systems, then the tool can operate in various environmental conditions, but the sealing performance degrades under extreme conditions such as cold temperatures causing fuel leakage
Solution Approach 1:
The patent changes the material parameter of the sealing component from traditional elastomers to a foam material with specific closed-cell structure. This material parameter change enables the seal to maintain its sealing properties across a wider temperature range, particularly preventing fuel leakage in cold conditions where traditional seals fail. The foam material's physical properties remain stable under extreme environmental conditions.
Solution Approach 2:
The patent employs a composite sealing structure combining a foam material body with an outer coating layer. The foam material provides the primary sealing function through its closed-cell structure, while the outer coating enhances fuel resistance and durability. This composite approach creates a sealing component that resists fuel degradation and maintains reliability in harsh environmental conditions.
2Reliability
If the fuel cell adapter uses rigid sealing components, then sealing is maintained under normal conditions, but the sealing engagement becomes inconsistent when the fuel cell is inserted or when temperature changes occur
Solution Approach 1:
The patent transitions from rigid sealing components to a flexible foam material that can dynamically adapt to dimensional changes. The foam seal deforms elastically to accommodate variations in fuel cell insertion position and maintains sealing contact despite temperature-induced expansion or contraction of mating surfaces. This dynamic flexibility ensures consistent sealing engagement under varying operational conditions.
Solution Approach 2:
The patent utilizes a foam material that functions as a flexible sealing element. The closed-cell foam structure provides both flexibility and structural integrity, allowing the seal to conform to the fuel cell interface while maintaining its shape and sealing pressure. This flexible approach compensates for manufacturing tolerances and thermal dimensional changes that rigid seals cannot accommodate.
Data Source
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AI summary
A combustion powered fastener driving tool including a fuel cell receiving block shaped and sized to receive and engage a fuel cell adapter of a fuel cell, the fuel cell adapter shaped and sized to form a fluid tight seal with the fuel cell receiving block.